RRPD Strategies for a T-OBS Network Architecture

In this paper, the authors deal with the Physical Layer Impairments (PLIs) in Optical Burst Switching (OBS). In particular they present a formulation of the Routing and Regenerator Placement and Dimensioning (RRPD) problem for a feasible Translucent OBS (T-OBS) network architecture. Since addressing the joint RRPD problem results in an extremely complex undertaking, they decouple the problem, and hence, they eventually provide formal models to solve routing and RPD separately in the so called R+RPD problem. Thus, making use of Mixed integer Linear Programming (MILP) formulations, they first address the routing problem with the aim of minimizing congestion in bottleneck network links, and second, they tackle the issue of performing a sparse placement of electrical regenerators in the network.